Blackboard @ Texas Tech Univers X Bb Accessing the WeBWork Homew X WeBWork : s121bai89622m2345s X *[Solved] Suppose a group of 100( X + X -> C a webwork.math.ttu.edu/webwork2/s121bai89622m2345sD01/_Unit_4_Homework_Set/7/?user=codoerr&key=ad6cV2QmgTQRa30pUIFegYeyPQUBX1... Paused WeBWork MAA Logged in as codoerr. Log Out C MATHEMATICAL ASSOCIATION OF AMERICA MAIN MENU webwork / s121bai89622m2345sd01 / _unit_4_homework_set / 7 Courses Homework Sets Unit 4 Homework Unit 4 Homework Set: Problem 7 Set Problem 7 Previous Problem Problem List Next Problem User Settings Grades (2 points) A sample of 7 measurements, randomly selected from a normally distributed population, resulted in a sample mean, x = 6.5 and sample standard deviation s = 1.55. Using a = 0.05, test the null hypothesis that the mean of the population is 5.7 against the Probl alternative hypothesis that the mean of the population, u > 5.7 by giving the following: (a) the degree of freedom b) the critical t value Problem 1 X (c) the test statistic Problem 2 V Problem 3 The final conclusion is Problem 4 X Problem 5 v O A. There is not sufficient evidence to reject the null hypothesis that u = 5.7. Problem 6 ... O B. We can reject the null hypothesis that u = 5.7 and accept that M c a webworkmathttuedu/webworkZ/s121bai89622m23455001/_Unit_4_Homework_Set/9/?key=ad6cVZngTQRaSOpUIFngeyPQUBX1gB8LeffectiveUs... xiv Q 15 Homework Sets A Unnwomework Unit 4 Homework Set: Problem 9 Set Problem 9 Previous Problem Problem List Next Problem User Settings Grades (2 points) Two statistics teachers both believe that each has the smarter class. To put this to the test, they give the same final exam to their students. A summary of the class sizes, class means, and standard deviations is given below: n1 = 43, 51 = 82.6, 31 = 15 n2 : 48, i2 : 78.8, 32 : 17.6 Problem 1 X Problem 2 J Is there evidence, at an a = 0.01 level of significance, to conclude that there is a difference in the two classes? (Assume that the problem 3 y population variances are equal.) Carry out an appropriate hypothesis test, filling in the information requested. Problem 4 X A. The value of the standardized test statistic: Problem 5 J Problem 6 Note: For the next part, your answer should use interval notation. An answer of the form (00, a) is expressed (-inf'ty, a), an answer of Problem 7 the form (b, 00) is expressed (b, infty). and an answer of the form (7007 a) U (b, 00) is expressed (-infty, a)U(b, infty). Problem 8 , , . . , , B. The rejectlon region for the standardized test statlstlc: Problem 9 Problem 10 C. The pvalue is . Problem 11 J Problem 12 J D. Your decision for the hypothesis test: Problem 13 J Problem 14 J O A. Do Not Reject H1. P bl 15 B. Do Not Reject H0. r em 0 c. Reject H1. Problem 16 X 0 D. Reject H0. Problem 17 J Problem 18 Note: You can earn partial credit on this problem. Preview My Answers Submit Answers /0 Type hereto Search ' ' 88F Sunny
